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-rw-r--r--Documentation/gpu/index.rst1
-rw-r--r--Documentation/gpu/tegra.rst178
-rw-r--r--drivers/gpu/drm/tegra/dc.c92
-rw-r--r--drivers/gpu/drm/tegra/drm.c119
-rw-r--r--drivers/gpu/drm/tegra/drm.h1
-rw-r--r--drivers/gpu/drm/tegra/gem.c5
-rw-r--r--drivers/gpu/drm/tegra/gem.h5
-rw-r--r--drivers/gpu/drm/tegra/gr2d.c11
-rw-r--r--drivers/gpu/drm/tegra/gr3d.c4
-rw-r--r--drivers/gpu/drm/tegra/vic.c4
-rw-r--r--drivers/gpu/host1x/bus.c75
-rw-r--r--drivers/gpu/host1x/cdma.h1
-rw-r--r--drivers/gpu/host1x/channel.c147
-rw-r--r--drivers/gpu/host1x/channel.h21
-rw-r--r--drivers/gpu/host1x/debug.c47
-rw-r--r--drivers/gpu/host1x/dev.c7
-rw-r--r--drivers/gpu/host1x/dev.h6
-rw-r--r--drivers/gpu/host1x/hw/channel_hw.c4
-rw-r--r--drivers/gpu/host1x/job.c124
-rw-r--r--drivers/gpu/host1x/job.h14
-rw-r--r--drivers/gpu/host1x/syncpt.c81
-rw-r--r--include/linux/host1x.h38
22 files changed, 784 insertions, 201 deletions
diff --git a/Documentation/gpu/index.rst b/Documentation/gpu/index.rst
index 037a39ac1807..35d673bf9b56 100644
--- a/Documentation/gpu/index.rst
+++ b/Documentation/gpu/index.rst
@@ -13,6 +13,7 @@ Linux GPU Driver Developer's Guide
i915
meson
pl111
+ tegra
tinydrm
vc4
vga-switcheroo
diff --git a/Documentation/gpu/tegra.rst b/Documentation/gpu/tegra.rst
new file mode 100644
index 000000000000..d2ed8938ca43
--- /dev/null
+++ b/Documentation/gpu/tegra.rst
@@ -0,0 +1,178 @@
+===============================================
+ drm/tegra NVIDIA Tegra GPU and display driver
+===============================================
+
+NVIDIA Tegra SoCs support a set of display, graphics and video functions via
+the host1x controller. host1x supplies command streams, gathered from a push
+buffer provided directly by the CPU, to its clients via channels. Software,
+or blocks amongst themselves, can use syncpoints for synchronization.
+
+Up until, but not including, Tegra124 (aka Tegra K1) the drm/tegra driver
+supports the built-in GPU, comprised of the gr2d and gr3d engines. Starting
+with Tegra124 the GPU is based on the NVIDIA desktop GPU architecture and
+supported by the drm/nouveau driver.
+
+The drm/tegra driver supports NVIDIA Tegra SoC generations since Tegra20. It
+has three parts:
+
+ - A host1x driver that provides infrastructure and access to the host1x
+ services.
+
+ - A KMS driver that supports the display controllers as well as a number of
+ outputs, such as RGB, HDMI, DSI, and DisplayPort.
+
+ - A set of custom userspace IOCTLs that can be used to submit jobs to the
+ GPU and video engines via host1x.
+
+Driver Infrastructure
+=====================
+
+The various host1x clients need to be bound together into a logical device in
+order to expose their functionality to users. The infrastructure that supports
+this is implemented in the host1x driver. When a driver is registered with the
+infrastructure it provides a list of compatible strings specifying the devices
+that it needs. The infrastructure creates a logical device and scan the device
+tree for matching device nodes, adding the required clients to a list. Drivers
+for individual clients register with the infrastructure as well and are added
+to the logical host1x device.
+
+Once all clients are available, the infrastructure will initialize the logical
+device using a driver-provided function which will set up the bits specific to
+the subsystem and in turn initialize each of its clients.
+
+Similarly, when one of the clients is unregistered, the infrastructure will
+destroy the logical device by calling back into the driver, which ensures that
+the subsystem specific bits are torn down and the clients destroyed in turn.
+
+Host1x Infrastructure Reference
+-------------------------------
+
+.. kernel-doc:: include/linux/host1x.h
+
+.. kernel-doc:: drivers/gpu/host1x/bus.c
+ :export:
+
+Host1x Syncpoint Reference
+--------------------------
+
+.. kernel-doc:: drivers/gpu/host1x/syncpt.c
+ :export:
+
+KMS driver
+==========
+
+The display hardware has remained mostly backwards compatible over the various
+Tegra SoC generations, up until Tegra186 which introduces several changes that
+make it difficult to support with a parameterized driver.
+
+Display Controllers
+-------------------
+
+Tegra SoCs have two display controllers, each of which can be associated with
+zero or more outputs. Outputs can also share a single display controller, but
+only if they run with compatible display timings. Two display controllers can
+also share a single framebuffer, allowing cloned configurations even if modes
+on two outputs don't match. A display controller is modelled as a CRTC in KMS
+terms.
+
+On Tegra186, the number of display controllers has been increased to three. A
+display controller can no longer drive all of the outputs. While two of these
+controllers can drive both DSI outputs and both SOR outputs, the third cannot
+drive any DSI.
+
+Windows
+~~~~~~~
+
+A display controller controls a set of windows that can be used to composite
+multiple buffers onto the screen. While it is possible to assign arbitrary Z
+ordering to individual windows (by programming the corresponding blending
+registers), this is currently not supported by the driver. Instead, it will
+assume a fixed Z ordering of the windows (window A is the root window, that
+is, the lowest, while windows B and C are overlaid on top of window A). The
+overlay windows support multiple pixel formats and can automatically convert
+from YUV to RGB at scanout time. This makes them useful for displaying video
+content. In KMS, each window is modelled as a plane. Each display controller
+has a hardware cursor that is exposed as a cursor plane.
+
+Outputs
+-------
+
+The type and number of supported outputs varies between Tegra SoC generations.
+All generations support at least HDMI. While earlier generations supported the
+very simple RGB interfaces (one per display controller), recent generations no
+longer do and instead provide standard interfaces such as DSI and eDP/DP.
+
+Outputs are modelled as a composite encoder/connector pair.
+
+RGB/LVDS
+~~~~~~~~
+
+This interface is no longer available since Tegra124. It has been replaced by
+the more standard DSI and eDP interfaces.
+
+HDMI
+~~~~
+
+HDMI is supported on all Tegra SoCs. Starting with Tegra210, HDMI is provided
+by the versatile SOR output, which supports eDP, DP and HDMI. The SOR is able
+to support HDMI 2.0, though support for this is currently not merged.
+
+DSI
+~~~
+
+Although Tegra has supported DSI since Tegra30, the controller has changed in
+several ways in Tegra114. Since none of the publicly available development
+boards prior to Dalmore (Tegra114) have made use of DSI, only Tegra114 and
+later are supported by the drm/tegra driver.
+
+eDP/DP
+~~~~~~
+
+eDP was first introduced in Tegra124 where it was used to drive the display
+panel for notebook form factors. Tegra210 added support for full DisplayPort
+support, though this is currently not implemented in the drm/tegra driver.
+
+Userspace Interface
+===================
+
+The userspace interface provided by drm/tegra allows applications to create
+GEM buffers, access and control syncpoints as well as submit command streams
+to host1x.
+
+GEM Buffers
+-----------
+
+The ``DRM_IOCTL_TEGRA_GEM_CREATE`` IOCTL is used to create a GEM buffer object
+with Tegra-specific flags. This is useful for buffers that should be tiled, or
+that are to be scanned out upside down (useful for 3D content).
+
+After a GEM buffer object has been created, its memory can be mapped by an
+application using the mmap offset returned by the ``DRM_IOCTL_TEGRA_GEM_MMAP``
+IOCTL.
+
+Syncpoints
+----------
+
+The current value of a syncpoint can be obtained by executing the
+``DRM_IOCTL_TEGRA_SYNCPT_READ`` IOCTL. Incrementing the syncpoint is achieved
+using the ``DRM_IOCTL_TEGRA_SYNCPT_INCR`` IOCTL.
+
+Userspace can also request blocking on a syncpoint. To do so, it needs to
+execute the ``DRM_IOCTL_TEGRA_SYNCPT_WAIT`` IOCTL, specifying the value of
+the syncpoint to wait for. The kernel will release the application when the
+syncpoint reaches that value or after a specified timeout.
+
+Command Stream Submission
+-------------------------
+
+Before an application can submit command streams to host1x it needs to open a
+channel to an engine using the ``DRM_IOCTL_TEGRA_OPEN_CHANNEL`` IOCTL. Client
+IDs are used to identify the target of the channel. When a channel is no
+longer needed, it can be closed using the ``DRM_IOCTL_TEGRA_CLOSE_CHANNEL``
+IOCTL. To retrieve the syncpoint associated with a channel, an application
+can use the ``DRM_IOCTL_TEGRA_GET_SYNCPT``.
+
+After opening a channel, submitting command streams is easy. The application
+writes commands into the memory backing a GEM buffer object and passes these
+to the ``DRM_IOCTL_TEGRA_SUBMIT`` IOCTL along with various other parameters,
+such as the syncpoints or relocations used in the job submission.
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 95b373f739f2..c875f11786b9 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -30,6 +30,7 @@ struct tegra_dc_soc_info {
bool supports_block_linear;
unsigned int pitch_align;
bool has_powergate;
+ bool broken_reset;
};
struct tegra_plane {
@@ -485,12 +486,25 @@ static int tegra_plane_state_add(struct tegra_plane *plane,
{
struct drm_crtc_state *crtc_state;
struct tegra_dc_state *tegra;
+ struct drm_rect clip;
+ int err;
/* Propagate errors from allocation or locking failures. */
crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
if (IS_ERR(crtc_state))
return PTR_ERR(crtc_state);
+ clip.x1 = 0;
+ clip.y1 = 0;
+ clip.x2 = crtc_state->mode.hdisplay;
+ clip.y2 = crtc_state->mode.vdisplay;
+
+ /* Check plane state for visibility and calculate clipping bounds */
+ err = drm_plane_helper_check_state(state, &clip, 0, INT_MAX,
+ true, true);
+ if (err < 0)
+ return err;
+
tegra = to_dc_state(crtc_state);
tegra->planes |= WIN_A_ACT_REQ << plane->index;
@@ -545,6 +559,23 @@ static int tegra_plane_atomic_check(struct drm_plane *plane,
return 0;
}
+static void tegra_dc_disable_window(struct tegra_dc *dc, int index)
+{
+ unsigned long flags;
+ u32 value;
+
+ spin_lock_irqsave(&dc->lock, flags);
+
+ value = WINDOW_A_SELECT << index;
+ tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER);
+
+ value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS);
+ value &= ~WIN_ENABLE;
+ tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
+
+ spin_unlock_irqrestore(&dc->lock, flags);
+}
+
static void tegra_plane_atomic_update(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
@@ -559,15 +590,18 @@ static void tegra_plane_atomic_update(struct drm_plane *plane,
if (!plane->state->crtc || !plane->state->fb)
return;
+ if (!plane->state->visible)
+ return tegra_dc_disable_window(dc, p->index);
+
memset(&window, 0, sizeof(window));
- window.src.x = plane->state->src_x >> 16;
- window.src.y = plane->state->src_y >> 16;
- window.src.w = plane->state->src_w >> 16;
- window.src.h = plane->state->src_h >> 16;
- window.dst.x = plane->state->crtc_x;
- window.dst.y = plane->state->crtc_y;
- window.dst.w = plane->state->crtc_w;
- window.dst.h = plane->state->crtc_h;
+ window.src.x = plane->state->src.x1 >> 16;
+ window.src.y = plane->state->src.y1 >> 16;
+ window.src.w = drm_rect_width(&plane->state->src) >> 16;
+ window.src.h = drm_rect_height(&plane->state->src) >> 16;
+ window.dst.x = plane->state->dst.x1;
+ window.dst.y = plane->state->dst.y1;
+ window.dst.w = drm_rect_width(&plane->state->dst);
+ window.dst.h = drm_rect_height(&plane->state->dst);
window.bits_per_pixel = fb->format->cpp[0] * 8;
window.bottom_up = tegra_fb_is_bottom_up(fb);
@@ -598,8 +632,6 @@ static void tegra_plane_atomic_disable(struct drm_plane *plane,
{
struct tegra_plane *p = to_tegra_plane(plane);
struct tegra_dc *dc;
- unsigned long flags;
- u32 value;
/* rien ne va plus */
if (!old_state || !old_state->crtc)
@@ -607,16 +639,7 @@ static void tegra_plane_atomic_disable(struct drm_plane *plane,
dc = to_tegra_dc(old_state->crtc);
- spin_lock_irqsave(&dc->lock, flags);
-
- value = WINDOW_A_SELECT << p->index;
- tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER);
-
- value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS);
- value &= ~WIN_ENABLE;
- tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
-
- spin_unlock_irqrestore(&dc->lock, flags);
+ tegra_dc_disable_window(dc, p->index);
}
static const struct drm_plane_helper_funcs tegra_primary_plane_helper_funcs = {
@@ -1856,6 +1879,7 @@ static const struct tegra_dc_soc_info tegra20_dc_soc_info = {
.supports_block_linear = false,
.pitch_align = 8,
.has_powergate = false,
+ .broken_reset = true,
};
static const struct tegra_dc_soc_info tegra30_dc_soc_info = {
@@ -1865,6 +1889,7 @@ static const struct tegra_dc_soc_info tegra30_dc_soc_info = {
.supports_block_linear = false,
.pitch_align = 8,
.has_powergate = false,
+ .broken_reset = false,
};
static const struct tegra_dc_soc_info tegra114_dc_soc_info = {
@@ -1874,6 +1899,7 @@ static const struct tegra_dc_soc_info tegra114_dc_soc_info = {
.supports_block_linear = false,
.pitch_align = 64,
.has_powergate = true,
+ .broken_reset = false,
};
static const struct tegra_dc_soc_info tegra124_dc_soc_info = {
@@ -1883,6 +1909,7 @@ static const struct tegra_dc_soc_info tegra124_dc_soc_info = {
.supports_block_linear = true,
.pitch_align = 64,
.has_powergate = true,
+ .broken_reset = false,
};
static const struct tegra_dc_soc_info tegra210_dc_soc_info = {
@@ -1892,6 +1919,7 @@ static const struct tegra_dc_soc_info tegra210_dc_soc_info = {
.supports_block_linear = true,
.pitch_align = 64,
.has_powergate = true,
+ .broken_reset = false,
};
static const struct of_device_id tegra_dc_of_match[] = {
@@ -1989,7 +2017,8 @@ static int tegra_dc_probe(struct platform_device *pdev)
return PTR_ERR(dc->rst);
}
- reset_control_assert(dc->rst);
+ if (!dc->soc->broken_reset)
+ reset_control_assert(dc->rst);
if (dc->soc->has_powergate) {
if (dc->pipe == 0)
@@ -2063,10 +2092,12 @@ static int tegra_dc_suspend(struct device *dev)
struct tegra_dc *dc = dev_get_drvdata(dev);
int err;
- err = reset_control_assert(dc->rst);
- if (err < 0) {
- dev_err(dev, "failed to assert reset: %d\n", err);
- return err;
+ if (!dc->soc->broken_reset) {
+ err = reset_control_assert(dc->rst);
+ if (err < 0) {
+ dev_err(dev, "failed to assert reset: %d\n", err);
+ return err;
+ }
}
if (dc->soc->has_powergate)
@@ -2096,10 +2127,13 @@ static int tegra_dc_resume(struct device *dev)
return err;
}
- err = reset_control_deassert(dc->rst);
- if (err < 0) {
- dev_err(dev, "failed to deassert reset: %d\n", err);
- return err;
+ if (!dc->soc->broken_reset) {
+ err = reset_control_deassert(dc->rst);
+ if (err < 0) {
+ dev_err(dev,
+ "failed to deassert reset: %d\n", err);
+ return err;
+ }
}
}
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index 51c48a8e00ec..ac15cc65af36 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -26,6 +26,7 @@
#define DRIVER_PATCHLEVEL 0
#define CARVEOUT_SZ SZ_64M
+#define CDMA_GATHER_FETCHES_MAX_NB 16383
struct tegra_drm_file {
struct idr contexts;
@@ -348,6 +349,36 @@ static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
return 0;
}
+static int host1x_waitchk_copy_from_user(struct host1x_waitchk *dest,
+ struct drm_tegra_waitchk __user *src,
+ struct drm_file *file)
+{
+ u32 cmdbuf;
+ int err;
+
+ err = get_user(cmdbuf, &src->handle);
+ if (err < 0)
+ return err;
+
+ err = get_user(dest->offset, &src->offset);
+ if (err < 0)
+ return err;
+
+ err = get_user(dest->syncpt_id, &src->syncpt);
+ if (err < 0)
+ return err;
+
+ err = get_user(dest->thresh, &src->thresh);
+ if (err < 0)
+ return err;
+
+ dest->bo = host1x_bo_lookup(file, cmdbuf);
+ if (!dest->bo)
+ return -ENOENT;
+
+ return 0;
+}
+
int tegra_drm_submit(struct tegra_drm_context *context,
struct drm_tegra_submit *args, struct drm_device *drm,
struct drm_file *file)
@@ -362,6 +393,8 @@ int tegra_drm_submit(struct tegra_drm_context *context,
struct drm_tegra_waitchk __user *waitchks =
(void __user *)(uintptr_t)args->waitchks;
struct drm_tegra_syncpt syncpt;
+ struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
+ struct host1x_syncpt *sp;
struct host1x_job *job;
int err;
@@ -369,6 +402,10 @@ int tegra_drm_submit(struct tegra_drm_context *context,
if (args->num_syncpts != 1)
return -EINVAL;
+ /* We don't yet support waitchks */
+ if (args->num_waitchks != 0)
+ return -EINVAL;
+
job = host1x_job_alloc(context->channel, args->num_cmdbufs,
args->num_relocs, args->num_waitchks);
if (!job)
@@ -383,18 +420,42 @@ int tegra_drm_submit(struct tegra_drm_context *context,
while (num_cmdbufs) {
struct drm_tegra_cmdbuf cmdbuf;
struct host1x_bo *bo;
+ struct tegra_bo *obj;
+ u64 offset;
if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
err = -EFAULT;
goto fail;
}
+ /*
+ * The maximum number of CDMA gather fetches is 16383, a higher
+ * value means the words count is malformed.
+ */
+ if (cmdbuf.words > CDMA_GATHER_FETCHES_MAX_NB) {
+ err = -EINVAL;
+ goto fail;
+ }
+
bo = host1x_bo_lookup(file, cmdbuf.handle);
if (!bo) {
err = -ENOENT;
goto fail;
}
+ offset = (u64)cmdbuf.offset + (u64)cmdbuf.words * sizeof(u32);
+ obj = host1x_to_tegra_bo(bo);
+
+ /*
+ * Gather buffer base address must be 4-bytes aligned,
+ * unaligned offset is malformed and cause commands stream
+ * corruption on the buffer address relocation.
+ */
+ if (offset & 3 || offset >= obj->gem.size) {
+ err = -EINVAL;
+ goto fail;
+ }
+
host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
num_cmdbufs--;
cmdbufs++;
@@ -402,17 +463,59 @@ int tegra_drm_submit(struct tegra_drm_context *context,
/* copy and resolve relocations from submit */
while (num_relocs--) {
+ struct host1x_reloc *reloc;
+ struct tegra_bo *obj;
+
err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
&relocs[num_relocs], drm,
file);
if (err < 0)
goto fail;
+
+ reloc = &job->relocarray[num_relocs];
+ obj = host1x_to_tegra_bo(reloc->cmdbuf.bo);
+
+ /*
+ * The unaligned cmdbuf offset will cause an unaligned write
+ * during of the relocations patching, corrupting the commands
+ * stream.
+ */
+ if (reloc->cmdbuf.offset & 3 ||
+ reloc->cmdbuf.offset >= obj->gem.size) {
+ err = -EINVAL;
+ goto fail;
+ }
+
+ obj = host1x_to_tegra_bo(reloc->target.bo);
+
+ if (reloc->target.offset >= obj->gem.size) {
+ err = -EINVAL;
+ goto fail;
+ }
}
- if (copy_from_user(job->waitchk, waitchks,
- sizeof(*waitchks) * num_waitchks)) {
- err = -EFAULT;
- goto fail;
+ /* copy and resolve waitchks from submit */
+ while (num_waitchks--) {
+ struct host1x_waitchk *wait = &job->waitchk[num_waitchks];
+ struct tegra_bo *obj;
+
+ err = host1x_waitchk_copy_from_user(wait,
+ &waitchks[num_waitchks],
+ file);
+ if (err < 0)
+ goto fail;
+
+ obj = host1x_to_tegra_bo(wait->bo);
+
+ /*
+ * The unaligned offset will cause an unaligned write during
+ * of the waitchks patching, corrupting the commands stream.
+ */
+ if (wait->offset & 3 ||
+ wait->offset >= obj->gem.size) {
+ err = -EINVAL;
+ goto fail;
+ }
}
if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
@@ -421,7 +524,15 @@ int tegra_drm_submit(struct tegra_drm_context *context,
goto fail;
}
+ /* check whether syncpoint ID is valid */
+ sp = host1x_syncpt_get(host1x, syncpt.id);
+ if (!sp) {
+ err = -ENOENT;
+ goto fail;
+ }
+
job->is_addr_reg = context->client->ops->is_addr_reg;
+ job->is_valid_class = context->client->ops->is_valid_class;
job->syncpt_incrs = syncpt.incrs;
job->syncpt_id = syncpt.id;
job->timeout = 10000;
diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h
index 85aa2e3d9d4e..6d6da01282f3 100644
--- a/drivers/gpu/drm/tegra/drm.h
+++ b/drivers/gpu/drm/tegra/drm.h
@@ -83,6 +83,7 @@ struct tegra_drm_client_ops {
struct tegra_drm_context *context);
void (*close_channel)(struct tegra_drm_context *context);
int (*is_addr_reg)(struct device *dev, u32 class, u32 offset);
+ int (*is_valid_class)(u32 class);
int (*submit)(struct tegra_drm_context *context,
struct drm_tegra_submit *args, struct drm_device *drm,
struct drm_file *file);
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index 424569b53e57..7a39a355678a 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -20,11 +20,6 @@
#include "drm.h"
#include "gem.h"
-static inline struct tegra_bo *host1x_to_tegra_bo(struct host1x_bo *bo)
-{
- return container_of(bo, struct tegra_bo, base);
-}
-
static void tegra_bo_put(struct host1x_bo *bo)
{
struct tegra_bo *obj = host1x_to_tegra_bo(bo);
diff --git a/drivers/gpu/drm/tegra/gem.h b/drivers/gpu/drm/tegra/gem.h
index 6c5f12ac0087..8b32a6fd586d 100644
--- a/drivers/gpu/drm/tegra/gem.h
+++ b/drivers/gpu/drm/tegra/gem.h
@@ -52,6 +52,11 @@ static inline struct tegra_bo *to_tegra_bo(struct drm_gem_object *gem)
return container_of(gem, struct tegra_bo, gem);
}
+static inline struct tegra_bo *host1x_to_tegra_bo(struct host1x_bo *bo)
+{
+ return container_of(bo, struct tegra_bo, base);
+}
+
struct tegra_bo *tegra_bo_create(struct drm_device *drm, size_t size,
unsigned long flags);
struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file,
diff --git a/drivers/gpu/drm/tegra/gr2d.c b/drivers/gpu/drm/tegra/gr2d.c
index 02cd3e37a6ec..6ea070da7718 100644
--- a/drivers/gpu/drm/tegra/gr2d.c
+++ b/drivers/gpu/drm/tegra/gr2d.c
@@ -38,7 +38,7 @@ static int gr2d_init(struct host1x_client *client)
client->syncpts[0] = host1x_syncpt_request(client->dev, flags);
if (!client->syncpts[0]) {
- host1x_channel_free(gr2d->channel);
+ host1x_channel_put(gr2d->channel);
return -ENOMEM;
}
@@ -57,7 +57,7 @@ static int gr2d_exit(struct host1x_client *client)
return err;
host1x_syncpt_free(client->syncpts[0]);
- host1x_channel_free(gr2d->channel);
+ host1x_channel_put(gr2d->channel);
return 0;
}
@@ -109,10 +109,17 @@ static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 offset)
return 0;
}
+static int gr2d_is_valid_class(u32 class)
+{
+ return (class == HOST1X_CLASS_GR2D ||
+ class == HOST1X_CLASS_GR2D_SB);
+}
+
static const struct tegra_drm_client_ops gr2d_ops = {
.open_channel = gr2d_open_channel,
.close_channel = gr2d_close_channel,
.is_addr_reg = gr2d_is_addr_reg,
+ .is_valid_class = gr2d_is_valid_class,
.submit = tegra_drm_submit,
};
diff --git a/drivers/gpu/drm/tegra/gr3d.c b/drivers/gpu/drm/tegra/gr3d.c
index 13f0d1b7cd98..cee2ab645cde 100644
--- a/drivers/gpu/drm/tegra/gr3d.c
+++ b/drivers/gpu/drm/tegra/gr3d.c
@@ -48,7 +48,7 @@ static int gr3d_init(struct host1x_client *client)
client->syncpts[0] = host1x_syncpt_request(client->dev, flags);
if (!client->syncpts[0]) {
- host1x_channel_free(gr3d->channel);
+ host1x_channel_put(gr3d->channel);
return -ENOMEM;
}
@@ -67,7 +67,7 @@ static int gr3d_exit(struct host1x_client *client)
return err;
host1x_syncpt_free(client->syncpts[0]);
- host1x_channel_free(gr3d->channel);
+ host1x_channel_put(gr3d->channel);
return 0;
}
diff --git a/drivers/gpu/drm/tegra/vic.c b/drivers/gpu/drm/tegra/vic.c
index cd804e404a11..47cb1aaa58b1 100644
--- a/drivers/gpu/drm/tegra/vic.c
+++ b/drivers/gpu/drm/tegra/vic.c
@@ -182,7 +182,7 @@ static int vic_init(struct host1x_client *client)
free_syncpt:
host1x_syncpt_free(client->syncpts[0]);
free_channel:
- host1x_channel_free(vic->channel);
+ host1x_channel_put(vic->channel);
detach_device:
if (tegra->domain)
iommu_detach_device(tegra->domain, vic->dev);
@@ -203,7 +203,7 @@ static int vic_exit(struct host1x_client *client)
return err;
host1x_syncpt_free(client->syncpts[0]);
- host1x_channel_free(vic->channel);
+ host1x_channel_put(vic->channel);
if (vic->domain) {
iommu_detach_device(vic->domain, vic->dev);
diff --git a/drivers/gpu/host1x/bus.c b/drivers/gpu/host1x/bus.c
index 561831e1ae2c..a048e3ac523d 100644
--- a/drivers/gpu/host1x/bus.c
+++ b/drivers/gpu/host1x/bus.c
@@ -40,6 +40,9 @@ struct host1x_subdev {
/**
* host1x_subdev_add() - add a new subdevice with an associated device node
+ * @device: host1x device to add the subdevice to
+ * @driver: host1x driver
+ * @np: device node
*/
static int host1x_subdev_add(struct host1x_device *device,
struct device_node *np)
@@ -62,6 +65,7 @@ static int host1x_subdev_add(struct host1x_device *device,
/**
* host1x_subdev_del() - remove subdevice
+ * @subdev: subdevice to remove
*/
static void host1x_subdev_del(struct host1x_subdev *subdev)
{
@@ -72,6 +76,8 @@ static void host1x_subdev_del(struct host1x_subdev *subdev)
/**
* host1x_device_parse_dt() - scan device tree and add matching subdevices
+ * @device: host1x logical device
+ * @driver: host1x driver
*/
static int host1x_device_parse_dt(struct host1x_device *device,
struct host1x_driver *driver)
@@ -166,6 +172,16 @@ static void host1x_subdev_unregister(struct host1x_device *device,
mutex_unlock(&device->subdevs_lock);
}
+/**
+ * host1x_device_init() - initialize a host1x logical device
+ * @device: host1x logical device
+ *
+ * The driver for the host1x logical device can call this during execution of
+ * its &host1x_driver.probe implementation to initialize each of its clients.
+ * The client drivers access the subsystem specific driver data using the
+ * &host1x_client.parent field and driver data associated with it (usually by
+ * calling dev_get_drvdata()).
+ */
int host1x_device_init(struct host1x_device *device)
{
struct host1x_client *client;
@@ -192,6 +208,15 @@ int host1x_device_init(struct host1x_device *device)
}
EXPORT_SYMBOL(host1x_device_init);
+/**
+ * host1x_device_exit() - uninitialize host1x logical device
+ * @device: host1x logical device
+ *
+ * When the driver for a host1x logical device is unloaded, it can call this
+ * function to tear down each of its clients. Typically this is done after a
+ * subsystem-specific data structure is removed and the functionality can no
+ * longer be used.
+ */
int host1x_device_exit(struct host1x_device *device)
{
struct host1x_client *client;
@@ -446,6 +471,14 @@ static void host1x_detach_driver(struct host1x *host1x,
mutex_unlock(&host1x->devices_lock);
}
+/**
+ * host1x_register() - register a host1x controller
+ * @host1x: host1x controller
+ *
+ * The host1x controller driver uses this to register a host1x controller with
+ * the infrastructure. Note that all Tegra SoC generations have only ever come
+ * with a single host1x instance, so this function is somewhat academic.
+ */
int host1x_register(struct host1x *host1x)
{
struct host1x_driver *driver;
@@ -464,6 +497,13 @@ int host1x_register(struct host1x *host1x)
return 0;
}
+/**
+ * host1x_unregister() - unregister a host1x controller
+ * @host1x: host1x controller
+ *
+ * The host1x controller driver uses this to remove a host1x controller from
+ * the infrastructure.
+ */
int host1x_unregister(struct host1x *host1x)
{
struct host1x_driver *driver;
@@ -513,6 +553,16 @@ static void host1x_device_shutdown(struct device *dev)
driver->shutdown(device);
}
+/**
+ * host1x_driver_register_full() - register a host1x driver
+ * @driver: host1x driver
+ * @owner: owner module
+ *
+ * Drivers for host1x logical devices call this function to register a driver
+ * with the infrastructure. Note that since these drive logical devices, the
+ * registration of the driver actually triggers tho logical device creation.
+ * A logical device will be created for each host1x instance.
+ */
int host1x_driver_register_full(struct host1x_driver *driver,
struct module *owner)
{
@@ -541,6 +591,13 @@ int host1x_driver_register_full(struct host1x_driver *driver,
}
EXPORT_SYMBOL(host1x_driver_register_full);
+/**
+ * host1x_driver_unregister() - unregister a host1x driver
+ * @driver: host1x driver
+ *
+ * Unbinds the driver from each of the host1x logical devices that it is
+ * bound to, effectively removing the subsystem devices that they represent.
+ */
void host1x_driver_unregister(struct host1x_driver *driver)
{
driver_unregister(&driver->driver);
@@ -551,6 +608,17 @@ void host1x_driver_unregister(struct host1x_driver *driver)
}
EXPORT_SYMBOL(host1x_driver_unregister);
+/**
+ * host1x_client_register() - register a host1x client
+ * @client: host1x client
+ *
+ * Registers a host1x client with each host1x controller instance. Note that
+ * each client will only match their parent host1x controller and will only be
+ * associated with that instance. Once all clients have been registered with
+ * their parent host1x controller, the infrastructure will set up the logical
+ * device and call host1x_device_init(), which will in turn call each client's
+ * &host1x_client_ops.init implementation.
+ */
int host1x_client_register(struct host1x_client *client)
{
struct host1x *host1x;
@@ -576,6 +644,13 @@ int host1x_client_register(struct host1x_client *client)
}
EXPORT_SYMBOL(host1x_client_register);
+/**
+ * host1x_client_unregister() - unregister a host1x client
+ * @client: host1x client
+ *
+ * Removes a host1x client from its host1x controller instance. If a logical
+ * device has already been initialized, it will be torn down.
+ */
int host1x_client_unregister(struct host1x_client *client)
{
struct host1x_client *c;
diff --git a/drivers/gpu/host1x/cdma.h b/drivers/gpu/host1x/cdma.h
index ec170a78f4e1..286d49386be9 100644
--- a/drivers/gpu/host1x/cdma.h
+++ b/drivers/gpu/host1x/cdma.h
@@ -88,7 +88,6 @@ struct host1x_cdma {
int host1x_cdma_init(struct host1x_cdma *cdma);
int host1x_cdma_deinit(struct host1x_cdma *cdma);
-void host1x_cdma_stop(struct host1x_cdma *cdma);
int host1x_cdma_begin(struct host1x_cdma *cdma, struct host1x_job *job);
void host1x_cdma_push(struct host1x_cdma *cdma, u32 op1, u32 op2);
void host1x_cdma_end(struct host1x_cdma *cdma, struct host1x_job *job);
diff --git a/drivers/gpu/host1x/channel.c b/drivers/gpu/host1x/channel.c
index 8f437d924c10..db9b91d1384c 100644
--- a/drivers/gpu/host1x/channel.c
+++ b/drivers/gpu/host1x/channel.c
@@ -24,19 +24,33 @@
#include "job.h"
/* Constructor for the host1x device list */
-int host1x_channel_list_init(struct host1x *host)
+int host1x_channel_list_init(struct host1x_channel_list *chlist,
+ unsigned int num_channels)
{
- INIT_LIST_HEAD(&host->chlist.list);
- mutex_init(&host->chlist_mutex);
-
- if (host->info->nb_channels > BITS_PER_LONG) {
- WARN(1, "host1x hardware has more channels than supported by the driver\n");
- return -ENOSYS;
+ chlist->channels = kcalloc(num_channels, sizeof(struct host1x_channel),
+ GFP_KERNEL);
+ if (!chlist->channels)
+ return -ENOMEM;
+
+ chlist->allocated_channels =
+ kcalloc(BITS_TO_LONGS(num_channels), sizeof(unsigned long),
+ GFP_KERNEL);
+ if (!chlist->allocated_channels) {
+ kfree(chlist->channels);
+ return -ENOMEM;
}
+ bitmap_zero(chlist->allocated_channels, num_channels);
+
return 0;
}
+void host1x_channel_list_free(struct host1x_channel_list *chlist)
+{
+ kfree(chlist->allocated_channels);
+ kfree(chlist->channels);
+}
+
int host1x_job_submit(struct host1x_job *job)
{
struct host1x *host = dev_get_drvdata(job->channel->dev->parent);
@@ -47,86 +61,107 @@ EXPORT_SYMBOL(host1x_job_submit);
struct host1x_channel *host1x_channel_get(struct host1x_channel *channel)
{
- int err = 0;
+ kref_get(&channel->refcount);
- mutex_lock(&channel->reflock);
+ return channel;
+}
+EXPORT_SYMBOL(host1x_channel_get);
- if (channel->refcount == 0)
- err = host1x_cdma_init(&channel->cdma);
+/**
+ * host1x_channel_get_index() - Attempt to get channel reference by index
+ * @host: Host1x device object
+ * @index: Index of channel
+ *
+ * If channel number @index is currently allocated, increase its refcount
+ * and return a pointer to it. Otherwise, return NULL.
+ */
+struct host1x_channel *host1x_channel_get_index(struct host1x *host,
+ unsigned int index)
+{
+ struct host1x_channel *ch = &host->channel_list.channels[index];
- if (!err)
- channel->refcount++;
+ if (!kref_get_unless_zero(&ch->refcount))
+ return NULL;
- mutex_unlock(&channel->reflock);
+ return ch;
+}
+
+static void release_channel(struct kref *kref)
+{
+ struct host1x_channel *channel =
+ container_of(kref, struct host1x_channel, refcount);
+ struct host1x *host = dev_get_drvdata(channel->dev->parent);
+ struct host1x_channel_list *chlist = &host->channel_list;
+
+ host1x_hw_cdma_stop(host, &channel->cdma);
+ host1x_cdma_deinit(&channel->cdma);
- return err ? NULL : channel;
+ clear_bit(channel->id, chlist->allocated_channels);
}
-EXPORT_SYMBOL(host1x_channel_get);
void host1x_channel_put(struct host1x_channel *channel)
{
- mutex_lock(&channel->reflock);
+ kref_put(&channel->refcount, release_channel);
+}
+EXPORT_SYMBOL(host1x_channel_put);
- if (channel->refcount == 1) {
- struct host1x *host = dev_get_drvdata(channel->dev->parent);
+static struct host1x_channel *acquire_unused_channel(struct host1x *host)
+{
+ struct host1x_channel_list *chlist = &host->channel_list;
+ unsigned int max_channels = host->info->nb_channels;
+ unsigned int index;
- host1x_hw_cdma_stop(host, &channel->cdma);
- host1x_cdma_deinit(&channel->cdma);
+ index = find_first_zero_bit(chlist->allocated_channels, max_channels);
+ if (index >= max_channels) {
+ dev_err(host->dev, "failed to find free channel\n");
+ return NULL;
}
- channel->refcount--;
+ chlist->channels[index].id = index;
- mutex_unlock(&channel->reflock);
+ set_bit(index, chlist->allocated_channels);
+
+ return &chlist->channels[index];
}
-EXPORT_SYMBOL(host1x_channel_put);
+/**
+ * host1x_channel_request() - Allocate a channel
+ * @device: Host1x unit this channel will be used to send commands to
+ *
+ * Allocates a new host1x channel for @device. If there are no free channels,
+ * this will sleep until one becomes available. May return NULL if CDMA
+ * initialization fails.
+ */
struct host1x_channel *host1x_channel_request(struct device *dev)
{
struct host1x *host = dev_get_drvdata(dev->parent);
- unsigned int max_channels = host->info->nb_channels;
- struct host1x_channel *channel = NULL;
- unsigned long index;
+ struct host1x_channel_list *chlist = &host->channel_list;
+ struct host1x_channel *channel;
int err;
- mutex_lock(&host->chlist_mutex);
+ channel = acquire_unused_channel(host);
+ if (!channel)
+ return NULL;
- index = find_first_zero_bit(&host->allocated_channels, max_channels);
- if (index >= max_channels)
- goto fail;
+ kref_init(&channel->refcount);
+ mutex_init(&channel->submitlock);
+ channel->dev = dev;
- channel = kzalloc(sizeof(*channel), GFP_KERNEL);
- if (!channel)
+ err = host1x_hw_channel_init(host, channel, channel->id);
+ if (err < 0)
goto fail;
- err = host1x_hw_channel_init(host, channel, index);
+ err = host1x_cdma_init(&channel->cdma);
if (err < 0)
goto fail;
- /* Link device to host1x_channel */
- channel->dev = dev;
-
- /* Add to channel list */
- list_add_tail(&channel->list, &host->chlist.list);
-
- host->allocated_channels |= BIT(index);
-
- mutex_unlock(&host->chlist_mutex);
return channel;
fail:
- dev_err(dev, "failed to init channel\n");
- kfree(channel);
- mutex_unlock(&host->chlist_mutex);
- return NULL;
-}
-EXPORT_SYMBOL(host1x_channel_request);
+ clear_bit(channel->id, chlist->allocated_channels);
-void host1x_channel_free(struct host1x_channel *channel)
-{
- struct host1x *host = dev_get_drvdata(channel->dev->parent);
+ dev_err(dev, "failed to initialize channel\n");
- host->allocated_channels &= ~BIT(channel->id);
- list_del(&channel->list);
- kfree(channel);
+ return NULL;
}
-EXPORT_SYMBOL(host1x_channel_free);
+EXPORT_SYMBOL(host1x_channel_request);
diff --git a/drivers/gpu/host1x/channel.h b/drivers/gpu/host1x/channel.h
index df767cf90d51..7068e42d42df 100644
--- a/drivers/gpu/host1x/channel.h
+++ b/drivers/gpu/host1x/channel.h
@@ -20,17 +20,21 @@
#define __HOST1X_CHANNEL_H
#include <linux/io.h>
+#include <linux/kref.h>
#include "cdma.h"
struct host1x;
+struct host1x_channel;
-struct host1x_channel {
- struct list_head list;
+struct host1x_channel_list {
+ struct host1x_channel *channels;
+ unsigned long *allocated_channels;
+};
- unsigned int refcount;
+struct host1x_channel {
+ struct kref refcount;
unsigned int id;
- struct mutex reflock;
struct mutex submitlock;
void __iomem *regs;
struct device *dev;
@@ -38,9 +42,10 @@ struct host1x_channel {
};
/* channel list operations */
-int host1x_channel_list_init(struct host1x *host);
-
-#define host1x_for_each_channel(host, channel) \
- list_for_each_entry(channel, &host->chlist.list, list)
+int host1x_channel_list_init(struct host1x_channel_list *chlist,
+ unsigned int num_channels);
+void host1x_channel_list_free(struct host1x_channel_list *chlist);
+struct host1x_channel *host1x_channel_get_index(struct host1x *host,
+ unsigned int index);
#endif
diff --git a/drivers/gpu/host1x/debug.c b/drivers/gpu/host1x/debug.c
index d9330fcc62ad..2aae0e63214c 100644
--- a/drivers/gpu/host1x/debug.c
+++ b/drivers/gpu/host1x/debug.c
@@ -43,24 +43,19 @@ void host1x_debug_output(struct output *o, const char *fmt, ...)
o->fn(o->ctx, o->buf, len);
}
-static int show_channels(struct host1x_channel *ch, void *data, bool show_fifo)
+static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo)
{
struct host1x *m = dev_get_drvdata(ch->dev->parent);
struct output *o = data;
- mutex_lock(&ch->reflock);
+ mutex_lock(&ch->cdma.lock);
- if (ch->refcount) {
- mutex_lock(&ch->cdma.lock);
+ if (show_fifo)
+ host1x_hw_show_channel_fifo(m, ch, o);
- if (show_fifo)
- host1x_hw_show_channel_fifo(m, ch, o);
+ host1x_hw_show_channel_cdma(m, ch, o);
- host1x_hw_show_channel_cdma(m, ch, o);
- mutex_unlock(&ch->cdma.lock);
- }
-
- mutex_unlock(&ch->reflock);
+ mutex_unlock(&ch->cdma.lock);
return 0;
}
@@ -94,28 +89,22 @@ static void show_syncpts(struct host1x *m, struct output *o)
host1x_debug_output(o, "\n");
}
-static void show_all(struct host1x *m, struct output *o)
+static void show_all(struct host1x *m, struct output *o, bool show_fifo)
{
- struct host1x_channel *ch;
+ int i;
host1x_hw_show_mlocks(m, o);
show_syncpts(m, o);
host1x_debug_output(o, "---- channels ----\n");
- host1x_for_each_channel(m, ch)
- show_channels(ch, o, true);
-}
-
-static void show_all_no_fifo(struct host1x *host1x, struct output *o)
-{
- struct host1x_channel *ch;
-
- host1x_hw_show_mlocks(host1x, o);
- show_syncpts(host1x, o);
- host1x_debug_output(o, "---- channels ----\n");
+ for (i = 0; i < m->info->nb_channels; ++i) {
+ struct host1x_channel *ch = host1x_channel_get_index(m, i);
- host1x_for_each_channel(host1x, ch)
- show_channels(ch, o, false);
+ if (ch) {
+ show_channel(ch, o, show_fifo);
+ host1x_channel_put(ch);
+ }
+ }
}
static int host1x_debug_show_all(struct seq_file *s, void *unused)
@@ -125,7 +114,7 @@ static int host1x_debug_show_all(struct seq_file *s, void *unused)
.ctx = s
};
- show_all(s->private, &o);
+ show_all(s->private, &o, true);
return 0;
}
@@ -137,7 +126,7 @@ static int host1x_debug_show(struct seq_file *s, void *unused)
.ctx = s
};
- show_all_no_fifo(s->private, &o);
+ show_all(s->private, &o, false);
return 0;
}
@@ -216,7 +205,7 @@ void host1x_debug_dump(struct host1x *host1x)
.fn = write_to_printk
};
- show_all(host1x, &o);
+ show_all(host1x, &o, true);
}
void host1x_debug_dump_syncpts(struct host1x *host1x)
diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
index f05ebb14fa63..5c1c711a21af 100644
--- a/drivers/gpu/host1x/dev.c
+++ b/drivers/gpu/host1x/dev.c
@@ -198,7 +198,8 @@ static int host1x_probe(struct platform_device *pdev)
host->iova_end = geometry->aperture_end;
}
- err = host1x_channel_list_init(host);
+ err = host1x_channel_list_init(&host->channel_list,
+ host->info->nb_channels);
if (err) {
dev_err(&pdev->dev, "failed to initialize channel list\n");
goto fail_detach_device;
@@ -207,7 +208,7 @@ static int host1x_probe(struct platform_device *pdev)
err = clk_prepare_enable(host->clk);
if (err < 0) {
dev_err(&pdev->dev, "failed to enable clock\n");
- goto fail_detach_device;
+ goto fail_free_channels;
}
err = reset_control_deassert(host->rst);
@@ -244,6 +245,8 @@ fail_reset_assert:
reset_control_assert(host->rst);
fail_unprepare_disable:
clk_disable_unprepare(host->clk);
+fail_free_channels:
+ host1x_channel_list_free(&host->channel_list);
fail_detach_device:
if (host->domain) {
put_iova_domain(&host->iova);
diff --git a/drivers/gpu/host1x/dev.h b/drivers/gpu/host1x/dev.h
index 229d08b6a45e..ffdbc15b749b 100644
--- a/drivers/gpu/host1x/dev.h
+++ b/drivers/gpu/host1x/dev.h
@@ -129,10 +129,8 @@ struct host1x {
struct host1x_syncpt *nop_sp;
struct mutex syncpt_mutex;
- struct mutex chlist_mutex;
- struct host1x_channel chlist;
- unsigned long allocated_channels;
- unsigned int num_allocated_channels;
+
+ struct host1x_channel_list channel_list;
struct dentry *debugfs;
diff --git a/drivers/gpu/host1x/hw/channel_hw.c b/drivers/gpu/host1x/hw/channel_hw.c
index 5e8df78b7acd..8447a56c41ca 100644
--- a/drivers/gpu/host1x/hw/channel_hw.c
+++ b/drivers/gpu/host1x/hw/channel_hw.c
@@ -181,10 +181,6 @@ error:
static int host1x_channel_init(struct host1x_channel *ch, struct host1x *dev,
unsigned int index)
{
- ch->id = index;
- mutex_init(&ch->reflock);
- mutex_init(&ch->submitlock);
-
ch->regs = dev->regs + index * HOST1X_CHANNEL_SIZE;
return 0;
}
diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c
index 5f5f8ee6143d..bee504406cfc 100644
--- a/drivers/gpu/host1x/job.c
+++ b/drivers/gpu/host1x/job.c
@@ -31,6 +31,8 @@
#include "job.h"
#include "syncpt.h"
+#define HOST1X_WAIT_SYNCPT_OFFSET 0x8
+
struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
u32 num_cmdbufs, u32 num_relocs,
u32 num_waitchks)
@@ -137,8 +139,9 @@ static void host1x_syncpt_patch_offset(struct host1x_syncpt *sp,
* avoid a wrap condition in the HW).
*/
static int do_waitchks(struct host1x_job *job, struct host1x *host,
- struct host1x_bo *patch)
+ struct host1x_job_gather *g)
{
+ struct host1x_bo *patch = g->bo;
int i;
/* compare syncpt vs wait threshold */
@@ -165,7 +168,8 @@ static int do_waitchks(struct host1x_job *job, struct host1x *host,
wait->syncpt_id, sp->name, wait->thresh,
host1x_syncpt_read_min(sp));
- host1x_syncpt_patch_offset(sp, patch, wait->offset);
+ host1x_syncpt_patch_offset(sp, patch,
+ g->offset + wait->offset);
}
wait->bo = NULL;
@@ -269,11 +273,12 @@ unpin:
return err;
}
-static int do_relocs(struct host1x_job *job, struct host1x_bo *cmdbuf)
+static int do_relocs(struct host1x_job *job, struct host1x_job_gather *g)
{
int i = 0;
u32 last_page = ~0;
void *cmdbuf_page_addr = NULL;
+ struct host1x_bo *cmdbuf = g->bo;
/* pin & patch the relocs for one gather */
for (i = 0; i < job->num_relocs; i++) {
@@ -286,6 +291,13 @@ static int do_relocs(struct host1x_job *job, struct host1x_bo *cmdbuf)
if (cmdbuf != reloc->cmdbuf.bo)
continue;
+ if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL)) {
+ target = (u32 *)job->gather_copy_mapped +
+ reloc->cmdbuf.offset / sizeof(u32) +
+ g->offset / sizeof(u32);
+ goto patch_reloc;
+ }
+
if (last_page != reloc->cmdbuf.offset >> PAGE_SHIFT) {
if (cmdbuf_page_addr)
host1x_bo_kunmap(cmdbuf, last_page,
@@ -302,6 +314,7 @@ static int do_relocs(struct host1x_job *job, struct host1x_bo *cmdbuf)
}
target = cmdbuf_page_addr + (reloc->cmdbuf.offset & ~PAGE_MASK);
+patch_reloc:
*target = reloc_addr;
}
@@ -319,6 +332,21 @@ static bool check_reloc(struct host1x_reloc *reloc, struct host1x_bo *cmdbuf,
if (reloc->cmdbuf.bo != cmdbuf || reloc->cmdbuf.offset != offset)
return false;
+ /* relocation shift value validation isn't implemented yet */
+ if (reloc->shift)
+ return false;
+
+ return true;
+}
+
+static bool check_wait(struct host1x_waitchk *wait, struct host1x_bo *cmdbuf,
+ unsigned int offset)
+{
+ offset *= sizeof(u32);
+
+ if (wait->bo != cmdbuf || wait->offset != offset)
+ return false;
+
return true;
}
@@ -329,6 +357,9 @@ struct host1x_firewall {
unsigned int num_relocs;
struct host1x_reloc *reloc;
+ unsigned int num_waitchks;
+ struct host1x_waitchk *waitchk;
+
struct host1x_bo *cmdbuf;
unsigned int offset;
@@ -341,6 +372,9 @@ struct host1x_firewall {
static int check_register(struct host1x_firewall *fw, unsigned long offset)
{
+ if (!fw->job->is_addr_reg)
+ return 0;
+
if (fw->job->is_addr_reg(fw->dev, fw->class, offset)) {
if (!fw->num_relocs)
return -EINVAL;
@@ -352,6 +386,33 @@ static int check_register(struct host1x_firewall *fw, unsigned long offset)
fw->reloc++;
}
+ if (offset == HOST1X_WAIT_SYNCPT_OFFSET) {
+ if (fw->class != HOST1X_CLASS_HOST1X)
+ return -EINVAL;
+
+ if (!fw->num_waitchks)
+ return -EINVAL;
+
+ if (!check_wait(fw->waitchk, fw->cmdbuf, fw->offset))
+ return -EINVAL;
+
+ fw->num_waitchks--;
+ fw->waitchk++;
+ }
+
+ return 0;
+}
+
+static int check_class(struct host1x_firewall *fw, u32 class)
+{
+ if (!fw->job->is_valid_class) {
+ if (fw->class != class)
+ return -EINVAL;
+ } else {
+ if (!fw->job->is_valid_class(fw->class))
+ return -EINVAL;
+ }
+
return 0;
}
@@ -428,11 +489,9 @@ static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
{
u32 *cmdbuf_base = (u32 *)fw->job->gather_copy_mapped +
(g->offset / sizeof(u32));
+ u32 job_class = fw->class;
int err = 0;
- if (!fw->job->is_addr_reg)
- return 0;
-
fw->words = g->words;
fw->cmdbuf = g->bo;
fw->offset = 0;
@@ -452,7 +511,9 @@ static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
fw->class = word >> 6 & 0x3ff;
fw->mask = word & 0x3f;
fw->reg = word >> 16 & 0xfff;
- err = check_mask(fw);
+ err = check_class(fw, job_class);
+ if (!err)
+ err = check_mask(fw);
if (err)
goto out;
break;
@@ -480,7 +541,6 @@ static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
goto out;
break;
case 4:
- case 5:
case 14:
break;
default:
@@ -504,7 +564,9 @@ static inline int copy_gathers(struct host1x_job *job, struct device *dev)
fw.dev = dev;
fw.reloc = job->relocarray;
fw.num_relocs = job->num_relocs;
- fw.class = 0;
+ fw.waitchk = job->waitchk;
+ fw.num_waitchks = job->num_waitchk;
+ fw.class = job->class;
for (i = 0; i < job->num_gathers; i++) {
struct host1x_job_gather *g = &job->gathers[i];
@@ -512,12 +574,20 @@ static inline int copy_gathers(struct host1x_job *job, struct device *dev)
size += g->words * sizeof(u32);
}
+ /*
+ * Try a non-blocking allocation from a higher priority pools first,
+ * as awaiting for the allocation here is a major performance hit.
+ */
job->gather_copy_mapped = dma_alloc_wc(dev, size, &job->gather_copy,
- GFP_KERNEL);
- if (!job->gather_copy_mapped) {
- job->gather_copy_mapped = NULL;
+ GFP_NOWAIT);
+
+ /* the higher priority allocation failed, try the generic-blocking */
+ if (!job->gather_copy_mapped)
+ job->gather_copy_mapped = dma_alloc_wc(dev, size,
+ &job->gather_copy,
+ GFP_KERNEL);
+ if (!job->gather_copy_mapped)
return -ENOMEM;
- }
job->gather_copy_size = size;
@@ -542,8 +612,8 @@ static inline int copy_gathers(struct host1x_job *job, struct device *dev)
offset += g->words * sizeof(u32);
}
- /* No relocs should remain at this point */
- if (fw.num_relocs)
+ /* No relocs and waitchks should remain at this point */
+ if (fw.num_relocs || fw.num_waitchks)
return -EINVAL;
return 0;
@@ -573,6 +643,12 @@ int host1x_job_pin(struct host1x_job *job, struct device *dev)
if (err)
goto out;
+ if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL)) {
+ err = copy_gathers(job, dev);
+ if (err)
+ goto out;
+ }
+
/* patch gathers */
for (i = 0; i < job->num_gathers; i++) {
struct host1x_job_gather *g = &job->gathers[i];
@@ -581,7 +657,9 @@ int host1x_job_pin(struct host1x_job *job, struct device *dev)
if (g->handled)
continue;
- g->base = job->gather_addr_phys[i];
+ /* copy_gathers() sets gathers base if firewall is enabled */
+ if (!IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
+ g->base = job->gather_addr_phys[i];
for (j = i + 1; j < job->num_gathers; j++) {
if (job->gathers[j].bo == g->bo) {
@@ -590,24 +668,18 @@ int host1x_job_pin(struct host1x_job *job, struct device *dev)
}
}
- err = do_relocs(job, g->bo);
+ err = do_relocs(job, g);
if (err)
break;
- err = do_waitchks(job, host, g->bo);
+ err = do_waitchks(job, host, g);
if (err)
break;
}
- if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) && !err) {
- err = copy_gathers(job, dev);
- if (err) {
- host1x_job_unpin(job);
- return err;
- }
- }
-
out:
+ if (err)
+ host1x_job_unpin(job);
wmb();
return err;
diff --git a/drivers/gpu/host1x/job.h b/drivers/gpu/host1x/job.h
index 878239c476d2..4bda51d503ec 100644
--- a/drivers/gpu/host1x/job.h
+++ b/drivers/gpu/host1x/job.h
@@ -27,20 +27,6 @@ struct host1x_job_gather {
bool handled;
};
-struct host1x_cmdbuf {
- u32 handle;
- u32 offset;
- u32 words;
- u32 pad;
-};
-
-struct host1x_waitchk {
- struct host1x_bo *bo;
- u32 offset;
- u32 syncpt_id;
- u32 thresh;
-};
-
struct host1x_job_unpin_data {
struct host1x_bo *bo;
struct sg_table *sgt;
diff --git a/drivers/gpu/host1x/syncpt.c b/drivers/gpu/host1x/syncpt.c
index 0ac026cdc30c..048ac9e344ce 100644
--- a/drivers/gpu/host1x/syncpt.c
+++ b/drivers/gpu/host1x/syncpt.c
@@ -99,14 +99,24 @@ unlock:
return NULL;
}
+/**
+ * host1x_syncpt_id() - retrieve syncpoint ID
+ * @sp: host1x syncpoint
+ *
+ * Given a pointer to a struct host1x_syncpt, retrieves its ID. This ID is
+ * often used as a value to program into registers that control how hardware
+ * blocks interact with syncpoints.
+ */
u32 host1x_syncpt_id(struct host1x_syncpt *sp)
{
return sp->id;
}
EXPORT_SYMBOL(host1x_syncpt_id);
-/*
- * Updates the value sent to hardware.
+/**
+ * host1x_syncpt_incr_max() - update the value sent to hardware
+ * @sp: host1x syncpoint
+ * @incrs: number of increments
*/
u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs)
{
@@ -175,8 +185,9 @@ u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp)
return sp->base_val;
}
-/*
- * Increment syncpoint value from cpu, updating cache
+/**
+ * host1x_syncpt_incr() - increment syncpoint value from CPU, updating cache
+ * @sp: host1x syncpoint
*/
int host1x_syncpt_incr(struct host1x_syncpt *sp)
{
@@ -195,8 +206,12 @@ static bool syncpt_load_min_is_expired(struct host1x_syncpt *sp, u32 thresh)
return host1x_syncpt_is_expired(sp, thresh);
}
-/*
- * Main entrypoint for syncpoint value waits.
+/**
+ * host1x_syncpt_wait() - wait for a syncpoint to reach a given value
+ * @sp: host1x syncpoint
+ * @thresh: threshold
+ * @timeout: maximum time to wait for the syncpoint to reach the given value
+ * @value: return location for the syncpoint value
*/
int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout,
u32 *value)
@@ -402,6 +417,16 @@ int host1x_syncpt_init(struct host1x *host)
return 0;
}
+/**
+ * host1x_syncpt_request() - request a syncpoint
+ * @dev: device requesting the syncpoint
+ * @flags: flags
+ *
+ * host1x client drivers can use this function to allocate a syncpoint for
+ * subsequent use. A syncpoint returned by this function will be reserved for
+ * use by the client exclusively. When no longer using a syncpoint, a host1x
+ * client driver needs to release it using host1x_syncpt_free().
+ */
struct host1x_syncpt *host1x_syncpt_request(struct device *dev,
unsigned long flags)
{
@@ -411,6 +436,16 @@ struct host1x_syncpt *host1x_syncpt_request(struct device *dev,
}
EXPORT_SYMBOL(host1x_syncpt_request);
+/**
+ * host1x_syncpt_free() - free a requested syncpoint
+ * @sp: host1x syncpoint
+ *
+ * Release a syncpoint previously allocated using host1x_syncpt_request(). A
+ * host1x client driver should call this when the syncpoint is no longer in
+ * use. Note that client drivers must ensure that the syncpoint doesn't remain
+ * under the control of hardware after calling this function, otherwise two
+ * clients may end up trying to access the same syncpoint concurrently.
+ */
void host1x_syncpt_free(struct host1x_syncpt *sp)
{
if (!sp)
@@ -438,9 +473,12 @@ void host1x_syncpt_deinit(struct host1x *host)
kfree(sp->name);
}
-/*
- * Read max. It indicates how many operations there are in queue, either in
- * channel or in a software thread.
+/**
+ * host1x_syncpt_read_max() - read maximum syncpoint value
+ * @sp: host1x syncpoint
+ *
+ * The maximum syncpoint value indicates how many operations there are in
+ * queue, either in channel or in a software thread.
*/
u32 host1x_syncpt_read_max(struct host1x_syncpt *sp)
{
@@ -450,8 +488,12 @@ u32 host1x_syncpt_read_max(struct host1x_syncpt *sp)
}
EXPORT_SYMBOL(host1x_syncpt_read_max);
-/*
- * Read min, which is a shadow of the current sync point value in hardware.
+/**
+ * host1x_syncpt_read_min() - read minimum syncpoint value
+ * @sp: host1x syncpoint
+ *
+ * The minimum syncpoint value is a shadow of the current sync point value in
+ * hardware.
*/
u32 host1x_syncpt_read_min(struct host1x_syncpt *sp)
{
@@ -461,6 +503,10 @@ u32 host1x_syncpt_read_min(struct host1x_syncpt *sp)
}
EXPORT_SYMBOL(host1x_syncpt_read_min);
+/**
+ * host1x_syncpt_read() - read the current syncpoint value
+ * @sp: host1x syncpoint
+ */
u32 host1x_syncpt_read(struct host1x_syncpt *sp)
{
return host1x_syncpt_load(sp);
@@ -482,6 +528,11 @@ unsigned int host1x_syncpt_nb_mlocks(struct host1x *host)
return host->info->nb_mlocks;
}
+/**
+ * host1x_syncpt_get() - obtain a syncpoint by ID
+ * @host: host1x controller
+ * @id: syncpoint ID
+ */
struct host1x_syncpt *host1x_syncpt_get(struct host1x *host, unsigned int id)
{
if (id >= host->info->nb_pts)
@@ -491,12 +542,20 @@ struct host1x_syncpt *host1x_syncpt_get(struct host1x *host, unsigned int id)
}
EXPORT_SYMBOL(host1x_syncpt_get);
+/**
+ * host1x_syncpt_get_base() - obtain the wait base associated with a syncpoint
+ * @sp: host1x syncpoint
+ */
struct host1x_syncpt_base *host1x_syncpt_get_base(struct host1x_syncpt *sp)
{
return sp ? sp->base : NULL;
}
EXPORT_SYMBOL(host1x_syncpt_get_base);
+/**
+ * host1x_syncpt_base_id() - retrieve the ID of a syncpoint wait base
+ * @base: host1x syncpoint wait base
+ */
u32 host1x_syncpt_base_id(struct host1x_syncpt_base *base)
{
return base->id;
diff --git a/include/linux/host1x.h b/include/linux/host1x.h
index 3d04aa1dc83e..630b1a98ab58 100644
--- a/include/linux/host1x.h
+++ b/include/linux/host1x.h
@@ -32,11 +32,27 @@ enum host1x_class {
struct host1x_client;
+/**
+ * struct host1x_client_ops - host1x client operations
+ * @init: host1x client initialization code
+ * @exit: host1x client tear down code
+ */
struct host1x_client_ops {
int (*init)(struct host1x_client *client);
int (*exit)(struct host1x_client *client);
};
+/**
+ * struct host1x_client - host1x client structure
+ * @list: list node for the host1x client
+ * @parent: pointer to struct device representing the host1x controller
+ * @dev: pointer to struct device backing this host1x client
+ * @ops: host1x client operations
+ * @class: host1x class represented by this client
+ * @channel: host1x channel associated with this client
+ * @syncpts: array of syncpoints requested for this client
+ * @num_syncpts: number of syncpoints requested for this client
+ */
struct host1x_client {
struct list_head list;
struct device *parent;
@@ -156,7 +172,6 @@ struct host1x_channel;
struct host1x_job;
struct host1x_channel *host1x_channel_request(struct device *dev);
-void host1x_channel_free(struct host1x_channel *channel);
struct host1x_channel *host1x_channel_get(struct host1x_channel *channel);
void host1x_channel_put(struct host1x_channel *channel);
int host1x_job_submit(struct host1x_job *job);
@@ -177,6 +192,13 @@ struct host1x_reloc {
unsigned long shift;
};
+struct host1x_waitchk {
+ struct host1x_bo *bo;
+ u32 offset;
+ u32 syncpt_id;
+ u32 thresh;
+};
+
struct host1x_job {
/* When refcount goes to zero, job can be freed */
struct kref ref;
@@ -226,7 +248,10 @@ struct host1x_job {
u8 *gather_copy_mapped;
/* Check if register is marked as an address reg */
- int (*is_addr_reg)(struct device *dev, u32 reg, u32 class);
+ int (*is_addr_reg)(struct device *dev, u32 class, u32 reg);
+
+ /* Check if class belongs to the unit */
+ int (*is_valid_class)(u32 class);
/* Request a SETCLASS to this class */
u32 class;
@@ -251,6 +276,15 @@ void host1x_job_unpin(struct host1x_job *job);
struct host1x_device;
+/**
+ * struct host1x_driver - host1x logical device driver
+ * @driver: core driver
+ * @subdevs: table of OF device IDs matching subdevices for this driver
+ * @list: list node for the driver
+ * @probe: called when the host1x logical device is probed
+ * @remove: called when the host1x logical device is removed
+ * @shutdown: called when the host1x logical device is shut down
+ */
struct host1x_driver {
struct device_driver driver;
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-11 22:27:46 +0000